On the market, there are many kinds of lubricating oils that can be used by ultrafine mill, and they are mostly similar in nature. But different kinds of lubricating oils are used in different environment, temperature, pressure speed and so on, that is to say, we can select the lubricating oils according to the differences of these factors. In general, when the crushers work with heavy load, the working parts are best to use more viscous lubricating oil. Because when the pressure is bigger, the oil will be extruded from the bearings, which will cause the rise in working temperature. When the rotating speed is small, we suggest to use more viscous oil, conversely, use less viscous oil. If the rotating speed and pressure are bigger, the less viscous oil can't be extruded, which will not cause the rise in working temperature. In winter, the temperature is low, the rock ultrafine mill that works in outdoor is preferred to use less viscous lubricating oil. Because the oil will be coagulated together and quickly harden along with the drop of temperature, which will bring a lot of resistance to the moving parts of ultrafine mills. Therefore, when choosing lubricating oil in winter, you'd better choose the lubricating oil whose temperature is lower 5 to 10 degrees centigrade than the surrounding temperature. If this kind of lubricating oil is lack in practical production, you can use all kinds of addictive’s or infiltrating diesel oil or solar oil so that you can tune into the required viscosity of lubricating oils. When selecting the types of lubricating oils or replacing oils, you should also take the wear degree of ultrafine mill parts into consideration. For example, the wearing parts generally use more viscous lubricating oils. When one kind of lubricating oil is replaced by another kind of lubricating oil, we can adopt according to its main quality indicator-viscosity. When using the lubricating oil in low temperature, condensation temperature of the oil should be considered. Correct and reasonable utilization of lubricating oil is very important to Chinese ultrafine mill and other crushing equipment, which is also one of the main reasons ensuring highly efficient production and proper maintenance of mining machines. The normal operation and efficient production are inseparable from the effect of lubricating oils. Especially for heavy mechanical equipment, the lubricating work of each part should be well done.

Large stone materials mined from the mines can be crushed by single-stage tertiary crusher for once and this crusher replaces traditional two-stage and three-stage ultrafine mill system, simplifies the ultrafine mill process and saves the investment. The follow-up operational cost is low, and in addition, the maintenance work is little and the final products are fine and even and the discharging granularity can be adjusted in the ranges of 5-40mm. Traditional jaw crusher, impact crusher and hammer crusher all have restrictions on the feeding and discharging granularity of the materials to be crushed and the main problems are that the output is low, working efficiency is low and the follow-up maintenance work is high; wear-resisting spiral sand washer has short service life, high investment, complicated technology and big coverage size. Sing-stage tertiary crusher is a new generation product researched and upgraded by integrating with all the advantages of traditional crushers and it is the best choice for processing large limestone materials.

China ultrafine mill Expo 2008 will be held at Beijing International Convention Center on November 11-13, 2008. China ultrafine mill is hosted by the Ministry of Land Resources, China is supported by domestic international governments, associations as well as organizations including the World Bank Group, China mining Association, Australian Embassy and Canadian Embassy. As one of the world's top four mining events and the biggest Asian platform for mining exploration and exploitation, the event provides an important channel for communication and exchanging information among global mining enterprises, while building relationships. After a very successful event last year, China ultrafine mill Expo is now approaching its 10th anniversary. More than 3000 registered delegates, 300 exhibitors and 30 sponsors from 45 countries and regions participated in last year's China ultrafine mill Expo. With a larger exhibition space and more conference streams we are expecting even more attendees of the world wide mining community to celebrate the 10th anniversary of China ultrafine mill Expo in this year. China ultrafine mill Expo 2008 consists of three parts conferences, exhibitions and featured events. Conferences During the conferences, high-level speakers from both Chinese and foreign mining industries will present and discuss new developments, investment policies and programs of the Chinese mining industry. China ultrafine mill speakers include high-level Chinese and International government representatives, domestic and international experts as well as CEOs and General Managers of large international mining companies. What they think and say matters.

The above-mentioned area theory, volume theory and fracture theory were proposed before the 1950s, surface grinding (grinding grain size 200-1000 mesh) and ultra-fine grinding (grinding grain size below) is 70 years later Appears, so the three power theory put forward can not consider the grinding mill and ultra-fine grinding of the power consumption. In front of the study of Hooke has been confirmed in the fine size of the grinding and ultrafine mill, that is, the use of area theory is not suited to calculate the error is too large. Therefore, must be in the three existing power theory and then in-depth look for fine grinding and ultra-fine grinding of the power consumption. The current mining project, the ore material crushing method is basically a mechanical crushing method dominated. Because the broken material has the following characteristics: (1) the tonnage is huge. Even a small concentrator, every day to break hundreds of tons of ore material, the election plant every day to break a few tons to tens of thousands of tons of ore. Which requires grinding equipment production capacity; (2) mineral hardness, wear and tear on the grinding equipment serious, which requires grinding equipment should be rugged and reliable; (3) high energy consumption, high material consumption, and the treatment of ore is cheap ore material, therefore. Broken cost is almost a decisive factor in the choice of crushing methods, and the fragmentation of low crushing methods is viable. The reason why the mechanical crushing method dominates because of its low cost. Although the mechanical crushing method has the disadvantages of high energy consumption, high material consumption and poor product characteristics, it can meet the requirements of the ore material for crushing. Present and future will remain the main method of broken ore.